Motion Adaptive EPS

How MA-EPS works

Part of the VSA (Vehicle Stability Assist) system, Motion Adaptive EPS is a stability system which automatically reinforces steering feedback aimed at prompting the driver to steer in the correct direction in situations where the car is threatened with instability. This is the latest addition to Honda's dynamic safety systems armoury, called Motion Adaptive EPS, it relies on the integration and networking of the VSA and EPS systems.

The VSA sensors immediately identify the instability and via the EPS a steering impulse in the required direction is initiated

Typical situations are where low grip, slippery conditions cause the car to understeer or oversteer when entering a corner or during sharp braking where the performance is affected by a road surface which has different friction coefficients - for example where it is dry on one side and slippery on the other because of, for example, wet leaves or snow and where there is a danger of the car becoming unsettled as a result of the overbraking of a wheel. The VSA sensors immediately identify the instability and via the EPS a steering input in the required direction is initiated.

The input from the EPS is barely noticeable and represents just a small amount of steering input; control of the steering remains with the driver at all times. But this supporting steering torque is enough to prompt the driver to act intuitively and to choose the optimum steering movement - steering into the skid when oversteering or prompting greater steering movement into the turn when understeering.

This steering support and the driver's reaction as a result is enough to regain stability or to shorten braking distances, allowing control to be maintained.